Fig. 4From: Propionibacterium acnes-associated chronic hypertrophic pachymeningitis followed by refractory otitis media: a case reportA biopsied tissue from the dura mater. a HE. b Propionibacterium acnes stain. c Mycobacteria stain. d CD20 stain. e CD4 stain. f CD8 stain. g IgG4 stain. h, i Enlarged views of the HE and Propionibacterium acnes stains, which are enclosed in the squares in (a) and (b), respectively. Bars: 50 μmBack to article page